Can you verify the output levels of your DAC using a voltmeter or an oscilloscope?
Recently my preamp has been away for service, so no balance control available. I ran the DAC directly to the power amps using its volume control. There appeared to be a channel imbalance, so following instructions found in the DAC's manual, I input a reference signal to the DAC and measured output in volts of each channel. There was a small difference, so I conclude my DAC needs adjustment.
It may only be coincidence, but this imbalance didn't show up until I began using a laptop as a source.
Recently my preamp has been away for service, so no balance control available. I ran the DAC directly to the power amps using its volume control. There appeared to be a channel imbalance, so following instructions found in the DAC's manual, I input a reference signal to the DAC and measured output in volts of each channel. There was a small difference, so I conclude my DAC needs adjustment.
It may only be coincidence, but this imbalance didn't show up until I began using a laptop as a source.